1372609 has 4 divisors (see below), whose sum is σ = 1568704. Its totient is φ = 1176516.

The previous prime is 1372607. The next prime is 1372621. The reversal of 1372609 is 9062731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9062731 = 73 ⋅124147.

It is a cyclic number.

It is not a de Polignac number, because 1372609 - 2¹ = 1372607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1372607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98037 + ... + 98050.

It is an arithmetic number, because the mean of its divisors is an integer number (392176).

2^1372609 is an apocalyptic number.

It is an amenable number.

1372609 is a deficient number, since it is larger than the sum of its proper divisors (196095).

1372609 is an equidigital number, since it uses as much as digits as its factorization.

1372609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196094.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 1372609 is about 1171.5839705288. The cubic root of 1372609 is about 111.1345121453.

The spelling of 1372609 in words is "one million, three hundred seventy-two thousand, six hundred nine".